Statements Based on a Heat Exchanger

[tomadevil]

Homework Statement

Hello Everyone,

We did an experiment using 3 types of heat exchangers this week, double-pipe, shell in tube and plate type. Water was flowing in the HEs, the temperature was set. We had to change the flow-rate only. After the experiment, we were given lots of online question. Some of them are very tricky and I am not really sure which one is the correct one. The questions are the following:

Homework Equations

N/A

The Attempt at a Solution

My guesses are the following:
Q1- 1 or 4 (definitely not 2 or 3)
Q2- maybe 1 (definitely not 4)Could you help me out, please?
Thanks in advance.

 

[Asymptotic]

Each of the questions may have multiple true answers.
What was used to measure flow rate?

 

[tomadevil]

Yes, I noticed it. :)
Sorry, I was wrong. It is a rotameter that was used to measure the flowrate.

 

[tomadevil]

Each of the questions may have multiple true answers.
What was used to measure flow rate?

Any idea for Question 1.?

 

[Asymptotic]

Any idea for Question 1.?

Are corrugated flat plates used in a double pipe heat exchanger design? Answering this correctly eliminates two of the possibilities.

 

[tomadevil]

Are corrugated flat plates used in a double pipe heat exchanger design? Answering this correctly eliminates two of the possibilities.

No, definitely not.
I think the answers are 1 and 4 for Q1 and Q2 also. I just would like someone to confirm if I am right:)

 

[Asymptotic]

No, definitely not.
I think the answers are 1 and 4 for Q1 and Q2 also. I just would like someone to confirm if I am right:)

This appears to be true of question 1.
Only you can answer Q2, part 2 - it depends on your experimental setup - and Q2, part 3 could go either way depending upon whether "co-flow" means concurrent flow versus counter-current flow.

 

[tomadevil]

This appears to be true of question 1.
Only you can answer Q2, part 2 - it depends on your experimental setup - and Q2, part 3 could go either way depending upon whether "co-flow" means concurrent flow versus counter-current flow.

Part 2 is definitely no.
Part 3, hmmm. That's a good question. I guess I need to ask my tutor because it could mean both as you said. Thanks.
There are two more questions:

I believe the answer for Q4 is part 1, definitely not part 3.
I really don't know the answer for Q6.

 

[Asymptotic]

Part 2 is definitely no.
Part 3, hmmm. That's a good question. I guess I need to ask my tutor because it could mean both as you said. Thanks.
There are two more questions:
View attachment 214883 View attachment 214884

I believe the answer for Q4 is part 1, definitely not part 3.
I really don't know the answer for Q6.

Both questions 4 and 6 contain answers that are definitional (time to re-read the lesson text) while others depend on your specific test setup. You'd learn little if I provided answers in the case of the former, and the latter are impossible to answer with the data you've provided.